edited by Linda Steg and Judith I.M. de Groot
John Wiley & Sons, 2019
Buku Teks
Lindgran, Henry Clay
John Wiley & Sons, 1966
Buku Teks
Thompson, Richard F., author
Harper & Row, 1975
Buku Teks
Hergenhahn, B.R., 1934-, author
Wadsworth, 2014
Buku Teks
edited by Miles Hewstone, Wolfgang Stroebe, Klaus Jonas
John Wiley & Sons, 2012
Buku Teks